does DNA change?

vceinc at aol.com wrote:
>> From the time a person is born until the time they die (hopefully to a
> ripe old age) does a person's DNA change. I know mutations occur, but,
> except for the mutations, do other changes occur?
> pete
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There are some rearrangements and deletions (specifically among immune
cells) throughout development. It is also possible (although hopefully
doesn't occur too often :) ) for DNA to be incorporated/altered/changed
through infections/actions of various microorganisms. . . .
Jeffrey Sonnentag